package net.sourceforge.fenixedu.domain;

import java.util.ArrayList;
import java.util.List;

import net.sourceforge.fenixedu.domain.accounting.PaymentCode;
import net.sourceforge.fenixedu.domain.accounting.PaymentCodeMapping;
import net.sourceforge.fenixedu.domain.exceptions.DomainException;
import net.sourceforge.fenixedu.domain.period.CandidacyPeriod;
import net.sourceforge.fenixedu.domain.period.DegreeCandidacyForGraduatedPersonCandidacyPeriod;
import net.sourceforge.fenixedu.domain.period.DegreeChangeCandidacyPeriod;
import net.sourceforge.fenixedu.domain.period.DegreeTransferCandidacyPeriod;
import net.sourceforge.fenixedu.domain.period.Over23CandidacyPeriod;
import net.sourceforge.fenixedu.domain.period.SecondCycleCandidacyPeriod;
import net.sourceforge.fenixedu.domain.period.StandaloneCandidacyPeriod;
import net.sourceforge.fenixedu.domain.time.calendarStructure.AcademicInterval;
import net.sourceforge.fenixedu.util.PeriodState;

import com.linkare.commons.metainfo.Linkare;

abstract public class ExecutionInterval extends ExecutionInterval_Base {

    protected ExecutionInterval() {
	super();
	setRootDomainObject(RootDomainObject.getInstance());
	setState(PeriodState.NOT_OPEN);
    }

    @Override
    public void setAcademicInterval(AcademicInterval academicInterval) {
	if (academicInterval == null) {
	    throw new DomainException("error.executionInterval.empty.executionInterval");
	}
	super.setAcademicInterval(academicInterval);
    }

    @Override
    public void setState(PeriodState state) {
	if (state == null) {
	    throw new DomainException("error.executionInterval.empty.state");
	}
	super.setState(state);
    }

    @jvstm.cps.ConsistencyPredicate
    protected boolean checkDateInterval() {
	return getBeginDateYearMonthDay() != null && getEndDateYearMonthDay() != null
		&& getBeginDateYearMonthDay().isBefore(getEndDateYearMonthDay());
    }

    public List<? extends CandidacyPeriod> getCandidacyPeriods(final Class<? extends CandidacyPeriod> clazz) {
	final List<CandidacyPeriod> result = new ArrayList<CandidacyPeriod>();
	for (final CandidacyPeriod candidacyPeriod : getCandidacyPeriods()) {
	    if (candidacyPeriod.getClass().equals(clazz)) {
		result.add(candidacyPeriod);
	    }
	}
	return result;
    }

    public boolean hasCandidacyPeriods(final Class<? extends CandidacyPeriod> clazz) {
	for (final CandidacyPeriod candidacyPeriod : getCandidacyPeriods()) {
	    if (candidacyPeriod.getClass().equals(clazz)) {
		return true;
	    }
	}
	return false;
    }

    public Over23CandidacyPeriod getOver23CandidacyPeriod() {
	final List<Over23CandidacyPeriod> candidacyPeriods = (List<Over23CandidacyPeriod>) getCandidacyPeriods(Over23CandidacyPeriod.class);
	return candidacyPeriods.isEmpty() ? null : candidacyPeriods.get(0);
    }

    public boolean hasOver23CandidacyPeriod() {
	return hasCandidacyPeriods(Over23CandidacyPeriod.class);
    }

    public List<SecondCycleCandidacyPeriod> getSecondCycleCandidacyPeriods() {
	return (List<SecondCycleCandidacyPeriod>) getCandidacyPeriods(SecondCycleCandidacyPeriod.class);
    }

    public boolean hasAnySecondCycleCandidacyPeriod() {
	return hasCandidacyPeriods(SecondCycleCandidacyPeriod.class);
    }

    public DegreeCandidacyForGraduatedPersonCandidacyPeriod getDegreeCandidacyForGraduatedPersonCandidacyPeriod() {
	final List<DegreeCandidacyForGraduatedPersonCandidacyPeriod> candidacyPeriods = (List<DegreeCandidacyForGraduatedPersonCandidacyPeriod>) getCandidacyPeriods(DegreeCandidacyForGraduatedPersonCandidacyPeriod.class);
	return candidacyPeriods.isEmpty() ? null : candidacyPeriods.get(0);
    }

    public boolean hasDegreeCandidacyForGraduatedPersonCandidacyPeriod() {
	return hasCandidacyPeriods(DegreeCandidacyForGraduatedPersonCandidacyPeriod.class);
    }

    public DegreeChangeCandidacyPeriod getDegreeChangeCandidacyPeriod() {
	final List<DegreeChangeCandidacyPeriod> candidacyPeriods = (List<DegreeChangeCandidacyPeriod>) getCandidacyPeriods(DegreeChangeCandidacyPeriod.class);
	return candidacyPeriods.isEmpty() ? null : candidacyPeriods.get(0);
    }

    public boolean hasDegreeChangeCandidacyPeriod() {
	return hasCandidacyPeriods(DegreeChangeCandidacyPeriod.class);
    }

    public DegreeTransferCandidacyPeriod getDegreeTransferCandidacyPeriod() {
	final List<DegreeTransferCandidacyPeriod> candidacyPeriods = (List<DegreeTransferCandidacyPeriod>) getCandidacyPeriods(DegreeTransferCandidacyPeriod.class);
	return candidacyPeriods.isEmpty() ? null : candidacyPeriods.get(0);
    }

    public boolean hasDegreeTransferCandidacyPeriod() {
	return hasCandidacyPeriods(DegreeTransferCandidacyPeriod.class);
    }

    public List<StandaloneCandidacyPeriod> getStandaloneCandidacyPeriods() {
	return (List<StandaloneCandidacyPeriod>) getCandidacyPeriods(StandaloneCandidacyPeriod.class);
    }

    public boolean hasAnyStandaloneCandidacyPeriod() {
	return hasCandidacyPeriods(StandaloneCandidacyPeriod.class);
    }

    public PaymentCode findNewCodeInPaymentCodeMapping(final PaymentCode oldCode) {
	for (final PaymentCodeMapping mapping : getPaymentCodeMappingsSet()) {
	    if (mapping.hasOldPaymentCode(oldCode)) {
		return mapping.getNewPaymentCode();
	    }
	}
	return null;
    }

    abstract public String getQualifiedName();

    abstract public boolean isCurrent();

    // static information

    static public List<ExecutionInterval> readExecutionIntervalsWithCandidacyPeriod(final Class<? extends CandidacyPeriod> clazz) {
	final List<ExecutionInterval> result = new ArrayList<ExecutionInterval>();
	for (final ExecutionInterval executionInterval : RootDomainObject.getInstance().getExecutionIntervals()) {
	    if (executionInterval.hasCandidacyPeriods(clazz)) {
		result.add(executionInterval);
	    }
	}
	return result;
    }

    public static ExecutionInterval getExecutionInterval(AcademicInterval academicInterval) {
	for (ExecutionInterval interval : RootDomainObject.getInstance().getExecutionIntervals()) {
	    if (interval.getAcademicInterval().equals(academicInterval))
		return interval;
	}
	return null;
    }

    @Linkare(author = "Paulo Zenida")
    @Override
    public String getShortDescription() {
	return getQualifiedName();
    }
}